The most important component of a car in Lima, as in many Latin American cities, is the horn. The horn is much more important than, for example, the breaks – one is used continuously during the course of driving, the other is practically never used.
Coming from an computer science background, I am considering inventing the auto-horn – a horn that sounds every second regardless of whether it is needed. I am quite sure this will make me rich.

What the horn means:

I am driving at 60kmph towards a crossing, you better get out of the way

I am also driving towards this crossing, you better get out of the way

I am a taxi – get in whether you want to or not

I am a combi – get in even though we are going the opposite way

I am changing lanes, I want to take the lane that is 4 lanes across to the left, in front of on-coming traffic, get out of my way

I am in a hurry, this horn negates that red light

I am coming up to a blind turn, but don’t feel like slowing down, if you hear this we’re probably going to die